std_iterator_traits.hpp

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#ifndef STAN_MATH_REV_CORE_STD_ITERATOR_TRAITS_HPP
#define STAN_MATH_REV_CORE_STD_ITERATOR_TRAITS_HPP
 
#include <stan/math/rev/core/var.hpp>
#include <stan/math/prim/meta.hpp>
#include <iterator>
 
namespace std {
template <typename Iter>
struct iterator_traits<stan::math::var_value<Iter>> {
  typedef random_access_iterator_tag iterator_category;
 
  typedef ptrdiff_t difference_type;
 
  typedef stan::math::var_value<Iter> value_type;
 
  typedef stan::math::var_value<Iter>* pointer;
 
  typedef stan::math::var_value<Iter>& reference;
};
}  // namespace std
 
#endif